This is designed for a warehouse where goods are stored and removed manually from the shelves. This system also make optimal use of warehouse height, as the higher level can be accessed manually or via gangways located between shelves. The number of walkways is determined by the height of the shelves, bearing in mind that the recommended height varies from 2.20 to 3.0 m. Likewise, the floor of the walkways can be various types : perforated plank, pressed grating, closed planks etc.